The Complete Guide to LinkedIn Post Dimensions and Sizes

You have drafted a brilliant hook, structured your insight cleanly, and built a compelling call-to-action. But when you hit publish, your custom graphic looks awkwardly cropped, your video has heavy black bars, or your crisp carousel text is blurry.

On a professional network where visual polish signals credibility, getting your dimensions wrong can quietly tank your reach. Because LinkedIn automatically compresses and crops assets that fall outside its preferred parameters, understanding exact pixel sizes is non-negotiable for creators, marketers, and professionals alike.

This comprehensive guide breaks down the precise dimensions, aspect ratios, and file limits for every type of LinkedIn post.

1. Single-Image Feed Posts

Single images are the workhorses of the LinkedIn feed. The platform supports three distinct aspect ratios, each serving a different strategic purpose:

| Format | Recommended Dimensions | Aspect Ratio | Best Used For |
| :— | :— | :— | :— |
| Portrait (Vertical) | 1080 × 1350 px | 4:5 | Maximum mobile visibility and thumb-stopping engagement. |
| Square | 1200 × 1200 px (or 1080 × 1080 px) | 1:1 | Clean, balanced display across both desktop and mobile. |
| Landscape | 1200 × 627 px | 1.91:1 | Traditional announcements, data charts, or landscapes. |

• Pro Tip for Images: Aim to design using PNG if your graphic contains text or sharp UI elements, and JPEG for photographs. Keep individual image file sizes under 5 MB.

2. Link Previews

When you paste an external URL into a post, LinkedIn automatically pulls an Open Graph preview image.

• Recommended Size: 1200 × 627 pixels (1.91:1 aspect ratio).
• The Catch: If your website’s preview image is too small or uses an irregular shape, LinkedIn will either shrink it into a tiny side thumbnail or pad it with awkward white space. Always configure your website’s meta tags to target the 1200 × 627 sweet spot.

3. Document & Carousel Posts (PDFs)

Document carousels—uploaded as PDFs—consistently rank among the highest-engagement formats on LinkedIn because users spend time swiping through slide decks.

• Slide Dimensions: 1080 × 1350 pixels (Portrait 4:5) for maximum mobile screen dominance, or 1080 × 1080 pixels (Square 1:1).
• File Format: PDF only (though PPTX and DOCX are technically accepted, PDF prevents formatting shifts).
• File Limits: Up to 100 MB and a maximum of 300 pages (though 5 to 10 slides is the content sweet spot).
• Design Rule: Pick one aspect ratio and stick to it for every slide; mixing square and portrait slides causes LinkedIn to apply messy padding.

4. Native Video Posts

Native video (videos uploaded directly rather than linked from YouTube) receives preferential algorithm distribution and auto-plays silently in user feeds.

• Landscape (16:9): 1920 × 1080 px (Ideal for desktop-heavy webinars or talking-head clips).
• Vertical (9:16): 1080 × 1920 px (Dominates mobile phone screens).
• Square (1:1): 1080 × 1080 px (A safe hybrid for multi-device viewing).
• Technical Constraints: Formats should be MP4 using the H.264 codec and AAC audio. Videos can run from 3 seconds up to 10 minutes (with a maximum file size of 5 GB, though files under 200 MB process much faster). Always burn captions into your video since most people watch on mute.

5. Profile & Company Page Essentials

Beyond individual posts, your digital storefront requires optimized dimensions so your branding doesn’t look pixelated:

• Personal Profile Photo: 400 × 400 pixels minimum (1:1 square, rendered in a circle). Keep your face centered with roughly 60% coverage.
• Personal Cover / Banner Image: 1584 × 396 pixels (4:1 aspect ratio). Keep critical text and logos within a centered safe zone, as mobile devices crop the left and right edges.
• Company Page Logo: 400 × 400 pixels (1:1 square).
• Company Page Cover Image: 1128 × 191 pixels (~6:1 aspect ratio).

💡 Quick Rule of Thumb: Because nearly 60% of LinkedIn traffic originates on mobile devices, prioritizing vertical formats (1080 × 1350 px for images/carousels and 9:16 for videos) gives your content the maximum possible real estate to stop the scroll.